G.Suparna is an original handcrafted guitar and bass brand operated by Gombo Bass Guitars, a repair and custom shop based in the Hirano Ward of Osaka, Japan. The name Suparna is drawn from Sanskrit for a mythic bird, and the brand's flagship bass designs — including models such as the Drake and Shrike — reflect that theme in their body shapes and aesthetic.

The shop handles repair, setup, and modification work alongside building its own instruments, with an emphasis on weight balance, ergonomics, and playability. G.Suparna instruments are sold through the brand's own online storefront and occasionally appear on the secondhand market via shops like Bass Shop Geek and Reverb.

The brand is perhaps best known outside Japan for its collaboration with Yoyoyoshie, guitarist and vocalist of the Osaka garage-punk band Otoboke Beaver, for whom Gombo/G.Suparna built the ROBIN signature electric guitar.

G.Suparna has 1 product cataloged on Equipboard, including Solid Body Electric Guitars. Their gear is featured by 1 artist, with the strongest followings in Rock. Notable users include Yoyoyoshie.